Operating point control method for the Mach-Zehnder modulator in a phase-shift laser range finder.
Opt Express
; 32(11): 19881-19894, 2024 May 20.
Article
en En
| MEDLINE
| ID: mdl-38859111
ABSTRACT
An operating point control method is proposed for the Mach-Zehnder modulator (MZM) based on a dual-cascaded MZM structure. Unlike traditional methods with dither signals, the proposed method is advantageous because the components monitored in the control process are not masked by the spectrum noise floor and the drift direction is clearly determined at the quadrature point, thus imparting greater control stability. Additionally, the proposed control method is suitable for phase-shift laser range finders (PSLRFs). Compared with traditional methods, experimental results reveal that the proposed method increases the operating point stability of MZM from ±0.59° to ±0.36° within 2â
h, resulting in better ranging stability than 17â
µm in 1 min and 39â
µm in 1â
h in a PSLRF with a 200â
MHz modulation frequency.
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MEDLINE
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En
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Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2024
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Article